Display screen with an icon



FIG. 1 is a front view of a display screen with an icon showing the new design; and,

FIG. 2 is a front view of an alternative embodiment of a display screen with an icon showing the design.

The broken lines showing the display screens are for environmental purposes only and form no part of the claimed design. 

CLAIM I claim the ornamental design for a display screen with an icon, as shown and described. 